During buccal collection, how many times should the mouth be scraped?

During buccal collection, how many times should the mouth be scraped?

• A. 8
• B. 4
• C. 6
• D. 10

Answer: (A)

Obtaining a reliable buccal DNA sample requires collecting enough epithelial cells, which means performing multiple scraping strokes across the inner cheek. The standard approach is eight scrapes in total—four on each buccal mucosa. Each scrape pulls cells from a new area, boosting the cell yield and improving the chances of getting a quality sample for analysis. Use firm, even strokes with the swab, keeping it flat against the cheek and avoiding contact with teeth, tongue, or saliva-rich surfaces. After completing four scrapes on one side, repeat on the other to reach eight. This balance helps ensure a sufficient, uncontaminated sample for testing while keeping the process comfortable.

Obtaining a reliable buccal DNA sample requires collecting enough epithelial cells, which means performing multiple scraping strokes across the inner cheek. The standard approach is eight scrapes in total—four on each buccal mucosa. Each scrape pulls cells from a new area, boosting the cell yield and improving the chances of getting a quality sample for analysis. Use firm, even strokes with the swab, keeping it flat against the cheek and avoiding contact with teeth, tongue, or saliva-rich surfaces. After completing four scrapes on one side, repeat on the other to reach eight. This balance helps ensure a sufficient, uncontaminated sample for testing while keeping the process comfortable.